Help / Advice needed on Buying a new exhaust

[TVRich]

Hello All

I am looking to buy a full exhaust system for my 1275 and cannot make up my mind which one to go for as there seem to be so many to choose from.

I know I want a twin centre exit and possibly stainless.

I want to go from block to tail (full system) any suggestions/recommendations?

Thanks

Rich

[Phil Hill]

Maniflow manifold of choice with either Maniflow system or RC40 (Think the stainless ones are "RC50" in Minispares speak). Both are good quality, a decent fit, and although different in exhaust note neither is unpleasent or excessively loud.

Phil.

[DanGT]

I have the same set up on my mini (not SS). It works well and makes good power. I have the two box system to keep it quite ( a littel more quite). I would think about how much and for how long you drive. A 1 box system can be fun for 30min but after 2h can start to get on you nurves. Hope this helps.

[speedymadr6]

Defintely go for a Maniflow LCB and RC40/RC50 been running this set up for years and always made good power increases with all my engines.

Go for twin bix if a daily driver, I now run a single box and the system is S/S all the way through and it IS very noisy.

[baller11]

Maniflow stage II lcb manifold connected to a single box stainless system

I am running a large bore single box side exit play mini exhaust on my 1293 and it is a daily driver.
If you want loud as possible wack a single box twin dtm play mini on it....a tad loud and some argue you loose back pressure too.

RC40 is the 'sensible' option, but i dont do sensible the play mini zaust i have is loud but not so loud your ears bleed. Fletcher back boxes look sweet too. Personally i would always put a stainless one one. Well worth the few extra ££s

Dave

Edited by baller11 on Monday 30th June 20:37

[Cooperman]

With a twin-pipe final exit you do stand to lose a bit of power. The ideal exhaust is a constant diameter from where the down-pipes merge right to the ultimate outlet. This keeps the velocity of the exhaust gas as constant as possible assuming you are using a 'proper' exhaust box(es) like Maniflow or RC40. Going from, say, a single 1.75" diameter exhaust pipe into the final box, then twin pipes after the final box will mean your exhaust gas velocity at exit is halved, and this is just what you don't want in performance terms. Take a look at the old works rally cars and thay all had a single centre-exit pipe to maximise exhaust gas flow efficiency as do the curremt successful race and historic rally Minis.

[TVRich]

Thanks guys
Certainly given me soething to think about.
Rich

[FWDRacer]

Twin Box RC40 is the only logical choice for road use. You can get a Stainless version, so that ticks your box, and the twin tailpipe comments made by Cooperman are spot on. A single correctly sized tailpipe will help power, rather than twin oversized pipes droning away and giving your ar*ehole a headache.

What looks better than a single pipe sticking straight out, and up slightly out of the middle at the back of a Mini?

[Cooperman]

As an interesting aside (maybe) the reason the centre exit tailpipe is 'turned-up' at the very end is that if you spin your rally car backwards into a bank, you don't want the tailpipe filling up with dirt because it won't re-start or run properly. I've actually had this happen to my rally car in the 60's before up-turned pipes were used and lost a lot of time digging out the DGS (Dirt, gGt & S**t) from the end of the exhaust.
Thought you might like to know that. More useless info from Cooperman!